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<!DOCTYPE html>
<html>
<head>
<title>Ruby Example</title>
<script type="text/javascript">
RubyModule = null; // Global application object.
statusText = 'NO-STATUS';
rubyReady = false;
// Indicate load success.
function moduleDidLoad() {
RubyModule = document.getElementById('ruby');
form = document.getElementById('source-form');
form.style.display = "block";
updateStatus('SUCCESS');
}
function evalSource() {
if (rubyReady) {
RubyModule.postMessage('eval:' + document.getElementById("source").value);
} else {
throw "Not yet ready";
}
return false;
}
function RubyError(message) {
this.message = message;
this.toString = function() {
return message;
}
}
function FatalError(message) {
this.message = message;
}
// The 'message' event handler. This handler is fired when the NaCl module
// posts a message to the browser by calling PPB_Messaging.PostMessage()
// (in C) or pp::Instance.PostMessage() (in C++). This implementation
// simply displays the content of the message in an alert panel.
function handleMessage(message_event) {
var raw = message_event.data;
var components;
if (raw.indexOf("error") == 0) {
components = raw.split(":", 2);
throw new RubyError(components[1]);
} else if (raw.indexOf("return") == 0) {
components = raw.split(":", 2);
document.getElementById("result").value = components[1];
} else if (raw == "rubyReady") {
rubyReady = true;
} else {
throw new FatalError(raw);
}
}
// If the page loads before the Native Client module loads, then set the
// status message indicating that the module is still loading. Otherwise,
// do not change the status message.
function pageDidLoad() {
if (RubyModule == null) {
updateStatus('LOADING...');
} else {
// It's possible that the Native Client module onload event fired
// before the page's onload event. In this case, the status message
// will reflect 'SUCCESS', but won't be displayed. This call will
// display the current message.
updateStatus();
}
}
// Set the global status message. If the element with id 'statusField'
// exists, then set its HTML to the status message as well.
// opt_message The message test. If this is null or undefined, then
// attempt to set the element with id 'statusField' to the value of
// |statusText|.
function updateStatus(opt_message) {
if (opt_message)
statusText = opt_message;
var statusField = document.getElementById('status_field');
if (statusField) {
statusField.innerHTML = statusText;
}
}
</script>
</head>
<body onload="pageDidLoad()">
<h1>Native Client Module Ruby</h1>
<p>
<!-- Load the published .nexe. This includes the 'nacl' attribute which
shows how to load multi-architecture modules. Each entry in the "nexes"
object in the .nmf manifest file is a key-value pair: the key is the
instruction set architecture ('x86-32', 'x86-64', etc.); the value is a URL
for the desired NaCl module.
To load the debug versions of your .nexes, set the 'nacl' attribute to the
_dbg.nmf version of the manifest file.
Note: Since this NaCl module does not use any real-estate in the browser,
it's width and height are set to 0.
Note: The <EMBED> element is wrapped inside a <DIV>, which has both a 'load'
and a 'message' event listener attached. This wrapping method is used
instead of attaching the event listeners directly to the <EMBED> element to
ensure that the listeners are active before the NaCl module 'load' event
fires. This also allows you to use PPB_Messaging.PostMessage() (in C) or
pp::Instance.PostMessage() (in C++) from within the initialization code in
your NaCl module.
-->
<div id="listener">
<script type="text/javascript">
var listener = document.getElementById('listener');
listener.addEventListener('load', moduleDidLoad, true);
listener.addEventListener('message', handleMessage, true);
</script>
<embed name="nacl_module"
id="ruby"
width="0" height="0"
src="ruby.nmf"
type="application/x-nacl" />
<form id="source-form" action="#" method="post" style="display:none"
onsubmit="evalSource(); return false">
<table>
<tbody>
<tr>
<th>Source</th>
<td>
<textarea rows="10" cols="80" id="source"></textarea>
<input type="submit" />
</td>
</tr>
<tr>
<th>Result</th>
<td>
<textarea rows="10" cols="80" id="result"></textarea>
</td>
</tr>
</tbody>
</table>
</form>
</div>
</p>
<h2>Status</h2>
<div id="status_field">NO-STATUS</div>
</body>
</html>
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